javascript cookie操作类的实现代码小结附使用方法

第一种方法：cookie操作类，代码封装了，下面也有使用方法，大家可以参考下。

String.prototype.Trim = function() 
{ 
return this.replace(/^\s+/g,"").replace(/\s+$/g,""); 
} 
function JSCookie() 
{ 
this.GetCookie = function(key) 
{ 
var cookie = document.cookie; 
var cookieArray = cookie.split(';'); 
var getvalue = ""; 
for(var i = 0;i<cookieArray.length;i++) 
{ 
if(cookieArray[i].Trim().substr(0,key.length) == key) 
{ 
getvalue = cookieArray[i].Trim().substr(key.length + 1); 
break; 
} 
} 
return getvalue; 
}; 
this.GetChild = function(cookiekey,childkey) 
{ 
var child = this.GetCookie(cookiekey); 
var childs = child.split('&'); 
var getvalue = ""; 
for(var i = 0;i < childs.length;i++) 
{ 
if(childs[i].Trim().substr(0,childkey.length) == childkey) 
{ 
getvalue = childs[i].Trim().substr(childkey.length + 1); 
break; 
} 
} 
return getvalue; 
}; 
this.SetCookie = function(key,value,expire,domain,path) 
{ 
var cookie = ""; 
if(key != null && value != null) 
cookie += key + "=" + value + ";"; 
if(expire != null) 
cookie += "expires=" + expire.toGMTString() + ";"; 
if(domain != null) 
cookie += "domain=" + domain + ";"; 
if(path != null) 
cookie += "path=" + path + ";"; 
document.cookie = cookie; 
}; 
this.Expire = function(key) 
{ 
expire_time = new Date(); 
expire_time.setFullYear(expire_time.getFullYear() - 1); 
var cookie = " " + key + "=e;expires=" + expire_time + ";" 
document.cookie = cookie; 
} 
}

用法：
一、设置cookie
var cookie = new JSCookie();
//普通设置
cookie .SetCookie("key1","val1");
//过期时间为一年
var expire_time = new Date();
expire_time.setFullYear(expire_time.getFullYear() + 1);
cookie .SetCookie("key2","val2",expire_time);
//设置域及路径，带过期时间
cookie .SetCookie("key3","val3",expire_time,".cnblogs.com","/");
//设置带子键的cookie,子键分别是k1,k2,k3
cookie .SetCookie("key4","k1=1&k2=2&k3=3");
二、读取cookie
//简单获取
cookie .GetCookie("key1");
cookie .GetCookie("key2");
cookie .GetCookie("key3");
cookie .GetCookie("key4");
//获取key4的子键k1值
cookie .GetChild("key4","k1");
三、删除
cookie .Expire("key1");
cookie .Expire("key2");
cookie .Expire("key3");
cookie .Expire("key4");
第二种方法：cookie操作函数，三水点靠木也是用的这个。大家可以根据需要选择。

function setCookie(name, value) //cookies设置JS 
{ 
var argv = setCookie.arguments; 
var argc = setCookie.arguments.length; 
var expires = (argc > 2) ? argv[2] : null; 
if(expires!=null) 
{ 
var LargeExpDate = new Date (); 
LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*3600*24)); 
} 
document.cookie = name + "=" + escape (value)+((expires == null) ? "" : ("; expires=" +LargeExpDate.toGMTString())); 
} function getCookie(Name) //cookies读取JS 
{ 
var search = Name + "=" 
if(document.cookie.length > 0) 
{ 
offset = document.cookie.indexOf(search) 
if(offset != -1) 
{ 
offset += search.length 
end = document.cookie.indexOf(";", offset) 
if(end == -1) end = document.cookie.length 
return unescape(document.cookie.substring(offset, end)) 
} 
else return "" 
} 
}

使用方法:

if(getCookie("yxjok")!="ok"){ 
//判断cookie中yxjok的值是不是为ok,不是则显示下面的广告。 
document.write('<div id="3water_yxj"><a href="https://3water.com" onclick="Closeyxj()" target="_blank"><img src="https://3water.com/images/logo.gif" 
/></a></div>'); 
} 
function Closeyxj(){ 
//关闭广告的现实。并用cookies记录已经显示过了，这里的功能主要是关闭后一段时间不显示默认是24小时。 
$("3water_yxj").style.display='none'; 
setCookie("yxjok","ok",10); 
} function setADCookie(name, value) //主要是修改了cookies的过期时间，为几分钟。 
{ 
var argv = setADCookie.arguments; 
var argc = setADCookie.arguments.length; 
var expires = (argc > 2) ? argv[2] : null; 
if(expires!=null) 
{ 
var LargeExpDate = new Date (); 
LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*300)); 
} 
document.cookie = name + "=" + escape (value)+((expires == null) ? "" : ("; expires=" +LargeExpDate.toGMTString())); 
}